Hello,
if these are the ones you're talking about
https/www.amazon.com/MSI-GP62MVR-Leopard-Pro-218-i7-6700HQ/dp/B01M0COXDI
http
/www.xoticpc.com/msi-gt62vr-dominator-pro-087.html
aside fo the SSD difference which you already mentioned, the main ones i can see:
GPU: GP62MVR has 1060 while the GT62VR has 1070 (a superior GPU)
here are the performance benchmarks for both:
http/www.notebookcheck.net/Mobile-NVIDIA-GeForce-GTX-1060-Laptop-Benchmarks-and-Specs.169547.0.html
http
/www.notebookcheck.net/Mobile-NVIDIA-GeForce-GTX-1070-Laptop.169549.0.html
RAM: GT62VR has faster memory (2400mMHz vs 2100MHz)
Thunderbolt 3: GT62VR has it while GP62MVR doesn't
cheers